What is Promptfoo?
Promptfoo operates as a specialized open-source platform designed to streamline the testing, evaluation, and security of AI prompts across diverse language models. By providing developers with structured, automated workflows, the company addresses the inherent volatility and unpredictability of large language model outputs. Its core value proposition lies in its ability to facilitate rigorous quality assurance, ensuring that enterprise-level AI deployments remain reliable, secure, and performant. As organizations increasingly integrate LLMs into their production environments, Promptfoo serves as a critical layer of governance and validation, positioning itself as an essential utility in the modern AI development stack.
How much funding has Promptfoo raised?
Promptfoo has raised a total of $40.9M across 3 funding rounds:
Angel/Seed
$5M
Stock/Share Issuance
$17.5M
Series A
$18.4M
Angel/Seed (2024): $5M with participation from Andreessen Horowitz
Series A (2025): $18.4M led by Insight Partners and Andreessen Horowitz
Stock/Share Issuance (2025): $17.5M, investors not publicly disclosed
Key Investors in Promptfoo
Insight Partners
Insight Partners is a global venture capital and private equity firm that invests in high-growth software and technology companies. It provides capital and hands-on operational support to help businesses scale from early stage to IPO, focusing on enterprise software, SaaS, and internet platforms.
Andreessen Horowitz
Founded in 2009, Andreessen Horowitz is a private American venture capital firm that invests in both early-stage start-ups and established growth companies. The company is headquartered in Menlo Park, California.
Undisclosed Investors
What's next for Promptfoo?
Looking ahead, the strategic deployment of this capital will likely focus on expanding the platform's feature set to support more complex multi-model architectures and enhancing its security-focused evaluation capabilities. The company is expected to prioritize talent acquisition and market expansion, aiming to capture a larger share of the enterprise software market. By leveraging the operational support of its investors, Promptfoo is set to refine its go-to-market strategy, ensuring that its automated testing solutions become the industry standard for organizations seeking to mitigate risks associated with AI implementation. The focus remains on maintaining its open-source roots while building a sustainable, high-growth business model that scales alongside the broader AI industry.
See full Promptfoo company page
